U.S. Warns Russia Any Ukraine Invasion Will Have “Severe” Response

United States Secretary of State Antony Blinken warned top Russian officials of a “swift” and “severe” response should Russia invade Ukraine. Also, new CDC studies confirm boosters shots provide the best protection against Omicron but the agency still will not commit to changing the definition of “fully vaccinated” to include a third shot. Dr. Anthony Fauci joins to answer why. To learn more about how CNN protects listener privacy, visit cnn.com/privacy